#include void main( void ) { Complex a (23.4, 28), b (25.7, 56.1); double c = 45.6; int d = 10; cout << a << " + " << b << " = " << flush; cout << ( a += b ) << endl; cout << b << " + " << c << " = " << flush; cout << ( b += c ) << endl; // Now the value of a has been changed cout << a << " + " << d << " = " << flush; cout << ( a += d ) << endl; }